Fluid additive injector



FIG. 1 is a perspective view looking downwardly from the left side of the front of a fluid additive injector in accordance with our design;

FIG. 2 is a perspective view looking downwardly from the right side of the front thereof

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left elevational view thereof;

FIG. 6 is a right elevational view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a perspective view looking downwardly from the left side of the top thereof;

FIG. 10 is a perspective view looking upwardly from the left side of the front thereof; and,

FIG. 11 is a perspective view looking downwardly from the left side of the rear thereof. 

CLAIM The ornamental design for a fluid additive injector, as shown and described. 